On Sun, 4 May 2008, Raymond E. Rogers wrote:
> Richard Hennessy wrote:
>> Maxima cannot evaluate bessel_i(-1/6,1). It seems like it does not evaluate for any negative first argument. Is there a work around for this?
>>
>> Rich
>>
>>
>>
>>
> Are you willing to use the recurrence from A&S?
> I have the book open or I can send a copy of the page.
>
> RayR
> _______________________________________________
For what it is worth, the R implementation of Bessel functions (which
comes from netlib), claims to use 9.1.2 and 9.6.2 from A&S and gives:
> besselI(1,-1/6)
[1] 1.313664
(Index/order and argument are in the reverse order in the R
implementation)
David Scott
_________________________________________________________________
David Scott Department of Statistics, Tamaki Campus
The University of Auckland, PB 92019
Auckland 1142, NEW ZEALAND
Phone: +64 9 373 7599 ext 86830 Fax: +64 9 373 7000
Email: d.scott at auckland.ac.nz
Graduate Officer, Department of Statistics
Director of Consulting, Department of Statistics